*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.w{
    position: relative;
    width:982px;
}
ul,li,dl,dt,dd{
    list-style: none;
}
img{
    border: 0;
    vertical-align: middle;
}
.fl{
    float: left;
}
.fr{
    float: right;
}
a{
    text-decoration: none;
}